Water emulsion type modified asphalt waterproof coating and application thereof

Abstract

The invention relates to the technical field of waterproof coatings, and provides a water emulsion type modified asphalt waterproof coating and application thereof, the waterproof coating comprises the following raw materials by weight: 28-32 parts of pure acrylic emulsion, 25-40 parts of emulsified asphalt, 20-40 parts of a filler, 1-10 parts of an auxiliary agent, and 10-20 parts of water. The preparation method comprises the following steps: stirring and mixing the water, the sterilizing agent, the dispersing agent and the defoaming agent, then adding the filler, stirring and mixing, adding the emulsified asphalt and the pure acrylic emulsion, continuously stirring, adding the additive, the thickening agent and the water, stirring and mixing to obtain the water emulsion type modified asphalt waterproof coating. The emulsified asphalt waterproof coating is obtained by effectively mixing the pure acrylic emulsion and the asphalt, an emulsification system is simple and environment-friendly, construction is convenient with water as a medium, no peculiar smell exists, the stretchability and outdoor weather resistance of the coating can be remarkably improved by adding the pure acrylic emulsion, the heavy calcium carbonate powder is used as a reinforcing agent, and the waterproof coating has good waterproof performance. The rheological property and the strength of the emulsified asphalt waterproof coating are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof coatings, and in particular to a water-emulsion type modified asphalt waterproof coating and application thereof. Background Art

[0002] Paint is a composite material that provides good protection for the surface of the base material, especially waterproof paint, which is widely used both as functional waterproofing outdoors and as decorative waterproofing indoors. Asphalt, as an organic gel material, is composed of a dark brown complex mixture of hydrocarbons of different molecular weights and their non-metallic derivatives, and has waterproof, moisture-proof and anti-corrosion properties. However, affected by its own performance and the environment, asphalt will have defects such as low-temperature embrittlement, high-temperature flow, poor elasticity and poor aging resistance after construction. Therefore, improving the service life and protective effect of coatings has become a research hotspot for many material researchers.

[0003] At present, the main forms of asphalt used are hot asphalt, diluted asphalt, and emulsified asphalt. Compared with other forms, emulsified asphalt has the advantages of energy saving, simple construction conditions, and low engineering cost. At the same time, it can effectively reduce the excessive aging of asphalt caused by high-temperature heating. Emulsified asphalt is a method of mechanically stirring and chemically stabilizing asphalt, emulsifier and water (emulsification) to generate a water-in-oil liquid emulsion, which has the characteristics of water-based environmental protection, low viscosity at room temperature, and good fluidity.

[0004] For example, Chinese patent announcement number CN114988764B provides a water-emulsified modified asphalt and its application, including the following weight parts: 20-30 parts of emulsified asphalt, 80-100 parts of aggregate and 20-30 parts of water, which is prepared by the following method: heating 100 parts by weight of base asphalt, then adding 3-9 parts by weight of stabilizing agent, stirring for 20-30 minutes, then adding 6-12 parts by weight of first emulsifier and 20-30 parts by weight of water, stirring and mixing, adding water-based polyacrylate emulsion, and continuing to stir and mix to obtain the emulsified asphalt. It has the advantages of low environmental pollution and low construction difficulty, and meets basic road use needs.

[0005] For example, publication number CN116789393A provides an emulsifier-type cold-mix cold-paved asphalt mixture and its preparation method, the patented formula includes 400-600 parts of coarse aggregate, 400-600 parts of fine aggregate, 90-160 parts of modified emulsified asphalt, 10-30 parts of mineral filler and 2-8 parts of water-reactive resin demulsifier; wherein the molecular weight of the water-reactive resin demulsifier is 1 million to 10 million. It can accelerate the speed of early strength formation of asphalt mixture without using cement and ensuring its road performance.

[0006] Traditional waterproof coatings have problems such as poor durability and complex construction. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a water-emulsified modified asphalt waterproof coating and its application, which are used to improve the problems of existing coatings of this type, such as poor durability and complex construction.

[0008] To achieve the above objectives, the present invention is implemented by the following technical scheme: A water-emulsified modified asphalt waterproof coating, comprising the following raw materials in parts by weight:

[0009] 28-32 parts of pure acrylic emulsion, 25-40 parts of emulsified asphalt, 20-40 parts of filler, 1-10 parts of additives, and 10-20 parts of water.

[0010] By adopting the above technical scheme, pure acrylic emulsion is introduced into the traditional asphalt material, and the excellent weather resistance and water solubility of the polymer are utilized, so that the resulting coating has the characteristics of good performance and environmental protection, good waterproof performance and convenient construction.

[0011] Preferably, the emulsified asphalt is anionic emulsified asphalt or nonionic emulsified asphalt with a solid content of 50-70%.

[0012] Preferably, the filler is heavy calcium powder with a particle size of 700-900 mesh, preferably 800 mesh.

[0013] By adopting the above technical scheme, heavy calcium powder is used as a reinforcing agent to improve the rheological properties and strength of the emulsified asphalt waterproof coating.

[0014] Preferably, the auxiliary agent is one or at least two of a thickener, a dispersant, a bactericide and a defoamer.

[0015] Preferably, the auxiliary agent is composed of the following raw materials, by weight: 1-2 parts of bactericide, 1-2 parts of dispersant, 1-2 parts of defoamer and 5-7 parts of thickener.

[0016] Preferably, the thickener is 935 thickener or polyurethane thickener.

[0017] Preferably, the fungicide is Defros CP19.

[0018] Preferably, the dispersant is a sodium salt dispersant of low molecular weight polyacrylic acid, and the defoamer is a non-ionic metal soap defoamer.

[0019] Preferably, the method for preparing the water-emulsified modified asphalt waterproof coating comprises the following steps:

[0020] Weigh the raw materials of each component according to the weight ratio, stir and mix water, fungicide, dispersant and defoamer at a speed of 500r / min, then add filler, stir and mix at a speed of 600-700r / min, add emulsified asphalt and pure acrylic emulsion, continue to stir at a speed of 500-700r / min, add auxiliary thickener and water, stir and mix at a speed of 700-800r / min, and obtain the water-emulsified modified asphalt waterproof coating.

[0021] Preferably, the water-emulsified modified asphalt waterproof coating can be used in the construction industry.

[0022] The present invention provides a water-emulsified modified asphalt waterproof coating and its application. It has the following beneficial effects:

[0023] 1. The present invention introduces pure acrylic emulsion into traditional asphalt materials and utilizes the excellent weather resistance and water solubility of the polymer to make the resulting coating have the characteristics of good performance and environmental protection, good waterproof performance and convenient construction.

[0024] 2. The present invention uses heavy calcium powder as a reinforcing agent to improve the rheological properties and strength of the emulsified asphalt waterproof coating.

[0025] 3. The water-emulsified modified asphalt waterproof coating of the present invention has good waterproofness, durability and convenient construction, and is environmentally friendly and non-toxic, and is suitable for waterproofing of buildings.

[0026] 4. The present invention optimizes the formula and stirring process to make the production process of the coating more efficient, reduce the stirring time and steps, and ensure the uniformity and stability of the coating. In addition, the coating of the water-emulsion system can be cured faster at a lower temperature, thereby shortening the construction period and improving the construction efficiency. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The embodiment of the present invention provides a water-emulsified modified asphalt waterproof coating, comprising the following raw materials in parts by weight:

[0029] 28-32 parts of pure acrylic emulsion, 25-40 parts of emulsified asphalt, 20-40 parts of filler, 1-10 parts of additives, and 10-20 parts of water.

[0030] By introducing pure acrylic emulsion, this water-based modified asphalt waterproof coating can make full use of the excellent weather resistance and water solubility of the polymer, improve the weather resistance of the coating, enable it to maintain stable performance under more complex environmental conditions, and is not easily affected by ultraviolet rays and temperature changes. At the same time, due to the use of water-based emulsion, compared with traditional oil-based asphalt coatings, it has fewer volatile harmful substances and is more environmentally friendly.

[0031] The combination of emulsified asphalt and pure acrylic emulsion makes the waterproof coating not only have good waterproof properties, but also have good construction properties. The addition of emulsified asphalt improves the fluidity of the coating, making it more convenient to apply. At the same time, the emulsion-based waterproof coating can be applied in a relatively humid environment and has stronger adaptability.

[0032] The emulsified asphalt adopts anionic emulsified asphalt or nonionic emulsified asphalt with a solid content of 50-70%.

[0033] The filler is heavy calcium powder with a particle size of 700-900 meshes, preferably 800 meshes.

[0034] Heavy calcium powder is used as a reinforcing agent to improve the rheological properties and strength of emulsified asphalt waterproof coatings. By introducing heavy calcium powder as a filler, especially heavy calcium powder with a particle size of 700-900 mesh, the rheological properties and strength of the coating can be significantly improved. As a reinforcing agent, heavy calcium powder can effectively improve the viscosity and thixotropy of the coating, making the coating easier to operate and more uniform during construction. At the same time, the addition of fillers can also enhance the crack resistance and durability of the coating.

[0035] The auxiliary agent is one or at least two of a thickener, a dispersant, a bactericide and a defoamer.

[0036] The addition of additives such as thickeners, dispersants, bactericides and defoamers further improves the functionality of the coating. These additives can not only improve the coating's coating properties, dispersibility and bactericidal effects, but also effectively avoid stratification, precipitation and bubble problems during storage and construction of the coating, thereby improving the overall stability and service life of the coating.

[0037] In one embodiment, the auxiliary agent is composed of the following raw materials, by weight: 1-2 parts of bactericide, 1-2 parts of dispersant, 1-2 parts of defoamer and 5-7 parts of thickener.

[0038] In one embodiment, the thickener is 935 thickener or polyurethane thickener.

[0039] In one embodiment, the bactericide is Defros CP19.

[0040] In one embodiment, the dispersant is a sodium salt dispersant of low molecular weight polyacrylic acid, and the defoaming agent is a non-ionic metal soap defoaming agent.

[0041] In one embodiment, a method for preparing a water-emulsified modified asphalt waterproof coating comprises the following steps:

[0042] Weigh the raw materials of each component according to the weight ratio, stir and mix water, fungicide, dispersant and defoamer at a speed of 500r / min, then add filler, stir and mix at a speed of 600-700r / min, add emulsified asphalt and pure acrylic emulsion, continue to stir at a speed of 500-700r / min, add auxiliary thickener and water, stir and mix at a speed of 700-800r / min, and obtain the water-emulsified modified asphalt waterproof coating.

[0043] By optimizing the formula and mixing process, the coating production process is made more efficient, the mixing time and steps are reduced, and the uniformity and stability of the coating are ensured. In addition, the water-based coating can be cured faster at a lower temperature, thus shortening the construction period and improving construction efficiency.

[0044] The water-emulsion modified asphalt waterproof coating of the present invention can be used in the construction industry.

[0045] The following is an introduction in conjunction with specific embodiments:

[0046] Embodiment 1:

[0047] A water-emulsified modified asphalt waterproof coating, comprising the following raw materials in parts by weight:

[0048] Pure acrylic emulsion: 30 parts

[0049] Emulsified asphalt (50-70% solid content, anionic): 30 parts

[0050] Filler (heavy calcium powder, particle size 800 mesh): 25 parts

[0051] Additives: 7 parts (including 5 parts thickener, 1 part dispersant, 1 part bactericide)

[0052] Water: 15 parts

[0053] The preparation method of the above-mentioned water-emulsion modified asphalt waterproof coating comprises the following steps:

[0054] Mixed solution: Add water, fungicide, dispersant and defoamer into the agitator, stir at a speed of 500r / min and mix evenly.

[0055] Add filler: gradually add heavy calcium powder with a particle size of 800 mesh, stir and mix at a speed of 600-700r / min.

[0056] Add emulsified asphalt and emulsion: Add emulsified asphalt and pure acrylic emulsion and continue stirring at a speed of 500-700r / min to ensure uniform dispersion.

[0057] Add thickener and water: Add thickener last, stir and mix at a speed of 700-800r / min until the coating is uniform and stable.

[0058] The coating preparation is completed: a water-emulsified modified asphalt waterproof coating is obtained.

[0059] Compared with the traditional asphalt coating, the performance test data of the waterproof coating of this embodiment is shown in Table 1 below, wherein the wear resistance, water resistance, adhesion and construction convenience are analyzed as follows:

[0060] Abrasion resistance: The coating of Example 1 performed well in the abrasion resistance test, which was about 35% higher than that of the conventional asphalt coating. This is because the addition of the filler heavy calcium powder enhanced the strength and rheological properties of the coating.

[0061] Water resistance: By optimizing the ratio of the emulsion and the emulsified asphalt, the water resistance of the coating of Example 1 is improved by about 60% compared with the prior art, showing a stronger waterproof effect.

[0062] Adhesion: The coating has significantly better adhesion than traditional asphalt coatings, with an increase of about 50%, which helps to improve the adhesion between the building surface and the waterproof layer.

[0063] Construction convenience: The construction time of the coating of Example 1 is shortened by about 35% compared with the traditional asphalt coating, and the fluidity and operability during construction are improved.

[0064] Embodiment 2:

[0065] A water-emulsified modified asphalt waterproof coating, comprising the following raw materials in parts by weight:

[0066] Pure acrylic emulsion: 28 parts

[0067] Emulsified asphalt (50-70% solid content, anionic): 25 parts

[0068] Filler (heavy calcium powder, particle size 800 mesh): 20 parts

[0069] Additives: 5 parts (including 3 parts thickener, 1 part dispersant, 1 part bactericide)

[0070] Water: 12 parts

[0071] The preparation method of the above-mentioned water-emulsion modified asphalt waterproof coating comprises the following steps:

[0072] Mixed solution: Add water, fungicide, dispersant and defoamer into the agitator, stir at a speed of 500r / min and mix evenly.

[0073] Add filler: gradually add heavy calcium powder with a particle size of 800 mesh, stir and mix at a speed of 600r / min.

[0074] Add emulsified asphalt and emulsion: Add emulsified asphalt and pure acrylic emulsion and continue stirring at a speed of 500r / min.

[0075] Add thickener and water: Add thickener and stir to mix at a speed of 700r / min until the coating is uniform and stable.

[0076] The coating preparation is completed: the water-emulsified modified asphalt waterproof coating is obtained.

[0077] Compared with the traditional asphalt coating, the performance test data of the waterproof coating of this embodiment is shown in Table 1 below, wherein the wear resistance, water resistance, adhesion and construction convenience are analyzed as follows:

[0078] Abrasion resistance: The abrasion resistance of Example 2 is improved by about 33% compared with the prior art. Although the amount of pure acrylic emulsion is low, it still maintains a good reinforcement effect.

[0079] Water resistance: The water resistance is improved by about 22%, proving that the water-emulsified modified asphalt waterproof coating still has good waterproof performance even below the formulation range.

[0080] Adhesion: Adhesion is increased by about 20%, and the bonding effect is improved compared with the existing technology.

[0081] Construction convenience: Construction convenience has been significantly improved, reducing construction time by about 30%.

[0082] Embodiment 3:

[0083] A water-emulsified modified asphalt waterproof coating, comprising the following raw materials in parts by weight:

[0084] Pure acrylic emulsion: 34 parts

[0085] Emulsified asphalt (50-70% solid content, anionic): 35 parts

[0086] Filler (heavy calcium powder, particle size 800 mesh): 30 parts

[0087] Additives: 9 parts (including 6 parts thickener, 1 part dispersant, 2 parts bactericide)

[0088] Water: 18 parts

[0089] The preparation method of the above-mentioned water-emulsion modified asphalt waterproof coating comprises the following steps:

[0090] Mixed solution: Add water, fungicide, dispersant and defoamer into the agitator, stir at a speed of 500r / min and mix evenly.

[0091] Add filler: gradually add heavy calcium powder with a particle size of 800 mesh, stir and mix at a speed of 700r / min.

[0092] Add emulsified asphalt and emulsion: Add emulsified asphalt and pure acrylic emulsion and continue stirring at a speed of 600r / min to ensure uniform dispersion.

[0093] Add thickener and water: Finally add thickener, stir to mix, speed of 800r / min, to ensure the coating is uniform and stable.

[0094] The coating preparation is completed: the water-emulsified modified asphalt waterproof coating is obtained.

[0095] Compared with the traditional asphalt coating, the performance test data of the waterproof coating of this embodiment is shown in Table 1 below, wherein the wear resistance, water resistance, adhesion and construction convenience are analyzed as follows:

[0096] Abrasion resistance: The coating of Example 3 has the best abrasion resistance, which is about 83% higher than that of traditional asphalt coatings. This is related to the increase of fillers and the optimized ratio of the emulsion.

[0097] Water resistance: Water resistance has been increased by about 100% to 360 hours, demonstrating stronger waterproof capabilities.

[0098] Adhesion: The adhesion is improved by about 80%, showing better bonding.

[0099] Ease of Application: Despite the higher formulation content, application time is reduced by 21% compared to traditional asphalt coatings.

[0100] Table 1:

[0101]

[0102]

[0103] Among them, Example 1 is the best balance with superior performance; Example 2 shows the effect when the composition is low, and the coating performance can still reach a high level; Example 3 shows the advantages of coatings with higher composition, although the construction convenience is slightly reduced, but other properties are significantly improved. The present invention introduces pure acrylic emulsion into traditional asphalt materials and utilizes the excellent weather resistance and water solubility of the polymer to make the resulting coating have the characteristics of good performance and environmental protection, good waterproof performance and construction convenience.

[0104] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-emulsified modified asphalt waterproof coating, characterized in that: The invention comprises the following raw materials in parts by weight: 28-32 parts of pure acrylic emulsion, 25-40 parts of emulsified asphalt, 20-40 parts of filler, 1-10 parts of additives, and 10-20 parts of water.

2. The water-emulsion modified asphalt waterproof coating according to claim 1, characterized in that: The emulsified asphalt is anionic emulsified asphalt or nonionic emulsified asphalt with a solid content of 50-70%.

3. The water-emulsion modified asphalt waterproof coating according to claim 1, characterized in that: The filler is heavy calcium powder with a particle size of 700-900 meshes.

4. The water-emulsion modified asphalt waterproof coating according to claim 1, characterized in that: The auxiliary agent is one or at least two of a thickener, a dispersant, a bactericide and a defoamer.

5. The water-emulsion modified asphalt waterproof coating according to claim 4, characterized in that: The auxiliary agent is composed of the following raw materials, calculated by weight: 1-2 parts of bactericide, 1-2 parts of dispersant, 1-2 parts of defoamer and 5-7 parts of thickener.

6. The water-emulsion modified asphalt waterproof coating according to claim 5, characterized in that: The thickener is 935 thickener or polyurethane thickener.

7. The water-emulsion modified asphalt waterproof coating according to claim 5, characterized in that: The fungicide is Defros CP19.

8. The water-emulsion modified asphalt waterproof coating according to claim 5, characterized in that: The dispersant is a sodium salt dispersant of low molecular weight polyacrylic acid, and the defoamer is a non-ionic metal soap defoamer.

9. A method for preparing a water-emulsified modified asphalt waterproof coating, characterized in that: Used for preparing the waterproof coating of water-emulsion modified asphalt according to any one of claims 5 to 8, The following steps are involved: Weigh the raw materials of each component according to the weight ratio, stir and mix water, fungicide, dispersant and defoamer at a speed of 500r / min, then add filler, stir and mix at a speed of 600-700r / min, add emulsified asphalt and pure acrylic emulsion, continue to stir at a speed of 500-700r / min, add auxiliary thickener and water, stir and mix at a speed of 700-800r / min, and obtain the water-emulsified modified asphalt waterproof coating.

10. Application of the water-emulsified modified asphalt waterproof coating according to any one of claims 1 to 8 in the construction industry.

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